FACTORY FARMS - AIR POLLUTION

This dairy is known as a "Confined Animal Feeding Operation" or CAFO. It will soon hold 1,500 dairy cows. The animals are kept indoors and are milked three times a day. (Photo by Mark Brush)

The way milk is produced has changed. A lot of
dairy farms are much bigger and more efficient. They're
often called factory farms. Mark Brush reports, neighbors
of these farms say they're paying a high price for the cheap
dairy products on your store shelves: